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How to properly set FM condenser set points

The OHEs use A350A/B and S350A/B temperature controllers to regulate fan operation. These controllers operate on 24 VAC, and each provides an SPDT relay output. Each controller has a front panel LED that indicates when the relay is energized.

Model

LNH 1140 rpm Larkin
Condensers

Fan Config.
1×N or 2×N

A350 Set
Point
S1 ºC (°F)

S350**
OFFSET S2
(°F)

S350**
OFFSET S3
(°F)

FM35

LNH-S01-A007
LNH-S01-A011
LNH-S02-A017

1 x 1
1 x 2
1 x 2

x
90
100

x
x
x

x
x
x

FM40

LNH-S02-A011
LNH-S02-A017
LNH-S02-A026

1 x 2
1 x 2
1 x 3

87
95
110

x
x
12

x
x
x

FM50

LNH-S02-A011
LNH-S02-A017
LNH-S02-A026

1 x 2
1 x 2
1 x 3

77
90
100

x
x
10

x
x
x

Note:** Larkin wires A350A/B and S350A/B as NC, jumper positions in A350A/B and S350A/B as
heating.